Initialize all disks and clear configuration...Need your help(Urgent)

Our scenario: We have a FAS2240-4 which was configured earlier with only one controller and the other controller was passive. The existing controller has 12 disks now and already assigned. Initially we bought this with 2 controllers but using one. Now we planned to add 12 more disks and enable the HA-pair(cf). I found a document from Netapp and I am following as per it. I have attached the document with this thread.

As per the document these are the steps:

1. Preparing for the upgrade on page 2 - ------- Done

2. Preparing a controller module when using Storage Encryption on page 2 ------ Not Applicable in our environment

3. Preparing the netboot server on page 3 -------- Done

4. Installing and cabling the new controller module on page 6 ------- Done

5. Booting and installing Data ONTAP on the new controller module on page 8 ----- Not Done (my question is here)

6. Setting up Data ONTAP on the new controller module on page 9

7. Verifying and setting the HA state of a FAS22xx, 32xx, or 62xx controller module and chassis on page 10